Inclosed fuse.



G. WRIGHT L F. WESTON. INGLOSED FUSE.'

APPLICATION FILED JUNE 21, 1911.

1,009,614. f Patented 11011.21, 1911.

V.5VS/'LL/xzwff' SILBERT WRIGHT FHELEHZUK H WEE TUN, EY MM THEIR TTm-mmy UNITED PATENT OFFICE.

GILBERT WRIGHT AND FREDERICK H. WESTON, F SCHENECTADY, NEW YORK, ASSIGNORS TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK;

INcLosEn FUSE.

Specicaten of letters Patent. vPatented NOV. 21, 1911.

Application filed June 21, 1911. Serial No. 634,625.

To all vwam/'L 'it may concern Be it known that we, GILBERT WRIGHT and FREDERICK H. lVEsioN, citizens of lthe United States, residing .it Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Inclosed Fuses, of which the following is a specification. Y

This invention relates to electric protec tirel devices, and more especially to inclosed fuses.

The object of the invention is to provide an inclosed fuse with a. connecting member between the end ofthe fusible element and the terminal contact which may beapplied with facility and will permit an unobstructed view of the soldered joint made between the connector and the fusible element. V

One form of the. invention is shown in the accompanying drawing, in which- Figure 1 is a longitudinal section of an inclosed fuse ofthe cigarette type embodying our invention; Fig. 2 is a fragmentary. longitudinal section taken at right angles to the view shown in Fig. 1; and Fi 3 is a similar view showing a slight modification.

The inclosed fuse shown in the drawing comprises a casing made up of a tube 1 of insulating'` material having metallic thimbles 2 inclosing the ends and contact terminals B in the form of knife blades extending through the thimbles 2 and secured to yoke pieces 4 having their ends bent'over so as to receive the screws 5 projecting through thimble flanges and the walls of the tube whereby the thimbles and terminals are secured together and to the insulating tube 1. The fusible element comprises a sheet of zinc or other readily fusible material 6 rolled up with interposed sheets of insulating material 7, such as asbestos paper, so as to leave portions of the fusible element pro-` jecting beyond the ends of the roll o f asbestos paper 7 The fusible element, in ad-` dition to being protected by the asbestos paper 7, is lsurrounded by a ranular substance 8 which absorbsm' con enses the volatile gases given oil' on blowing of the fusible element.

The project-ing ends 9 of the fusible element are connected to the terminal contacts 3 by metallic connectors 10, each made of ltwo T-shaped pieces of sheet Inet-al. shaped so as to have a semicircular flange 11 at one end and a bent arm 12 projecting therefrom. These pairs of connectors are joined by rivets 13 to opposite. sides otra contact terniinal 3 and also soldered to insure an electrically conducting joint, while the two 'semicircular flanges l1 form a compl-ete ring about the projecting end t) of the fusible element. and at the same time leave the outer end of the y element accessible to theworkman so, that he may apply solder 14; thcrcaboutand to the inner surface of the ring portion of the conl nector. In the construction shown in Fig. 1, the solder is applied Aby the use of an ordinary soldering iron. tion shown in Fig. 3, the solder applied by placing a stopper or plug in the bore 15 of the roll of asbestos paper 7 and pouring the solder 14 into the space between the plug and connector ring 11 with the parts held invertical position. The construction is such that the two members of an end connector may be readily spread by the in- 'sertlon of a` tinger between them so as to be readily disposed about thecnd 9 of the fusible member and allowed to contract there.- upon; it also enables the workman to inspect the soldered joint and thereby make sure that the solder is properly applied, and also affords a rigid support for the fusible element whereby it is held centered with rela,- tion to the inclosing casing.

To do not desire to restrict ourselves to the particular form or arrangement of parts herein shown and described, since it is apparent that they may be changed and modified without departing from our invention.

What we claim as new, and desire to secure by Letters Patent States, is z- 1. In an inclosed fuse, the combii'iat-ion of a tubular'fusible member, and connectors each comprising an open ring surrounding the end of the fusible member and connected by solder thereto.

2. In an inclosed fuse, the combination of u tubular fusible member, ano' connectors each comprising two sheet metal parts cacl.

having a semicircular flange connected by solder to the end of the fusible member, and an arm projectlng from said flange.

ln the construcof the Unitedl Tn an ndosed fuse, the combination of a tubular usxble member', Contact termnas, and Connectors each conslsv'mg of L pans of Sl met-d T-hnped parte bent to form e,

In Witness whereof, we have hereunto set our hands thie lh 11h13' of June, 1911. 5 einem WMGHT. Wemmel* H. eee'is. ring about the end of the fusible element lleses: with the arms disposed on Opposite Sdes BENJAMIN HULL,

ofthe 'fermmzu fLuzGARe'r E. *,KTOOLLEY.

Copies of this paten may 'ne obtained for ve cents each, by adressing the Commissioner of Fetal-ms, Washington, E. Q. 

